Continuity mistake: The episode "Clash Reunion" shows Megavolt in his flashback becoming a supervillain in high school. For one moment he's wearing his trademark goggles, then afterwards they're gone. (00:05:05)
The Contest - S1-E24
Continuity mistake: When the mailman delivers Tom's mail, Tom walks up to his mailbox. In the wide shot, the lid on the mailbox is open, but in the close-up shots, the lid is closed.
Members Only - S1-E2
Continuity mistake: In the last scene, when Daffy and Bugs are talking to each other, Daffy's towel is yellow and in the next shot, it's white.
Continuity mistake: Chris has a blue dye pack explode on him, covering the front of his clown costume and face. But then shortly after, the dye is gone from his face and clothes.
Beyond the Farthest Star - S1-E1
Continuity mistake: There is an alien in a Starfleet gold shirt sitting next to Sulu. For a second, there is a human in a Starfleet red shirt, then it goes back to the gold shirt alien.
Continuity mistake: After Cat Burglar steals Craig's staff at the award ceremony Silver Fist goes after Cat Burglar, and just as Silver Fist climbs up on the roof, his crossed straps become crossed the opposite way, mid shot. (00:05:50)
Other mistake: When Teela is at Snake Mountain, she overhears TrapJaw saying how Skeletor's electrical creature will control all of the machines at the palace. When Teela returns to He-Man, she says that the creature Skeletor created is called Byte. There's no way for Teela to know the name of the creature, since TrapJaw never referred to it by name. (00:14:24 - 00:15:20)
Continuity mistake: In the close-up of putting the lids on the bottles, Mat's hands have 5 fingers (briefly done by a real person instead of the puppets). However, throughout the series, the duo is consistently 4-fingered - and that includes other close-ups that were also created with real hands briefly replacing the animation.
Coach Fussell's Lament - S2-E5
Continuity mistake: Chairface and Chrome Dome arrive at the Brianchild's house in the same car, but drive off in separate cars.
Revealing mistake: When Grapefruit cannonballs into the pull, it splashes on Pear. But no sign of any wetness is seen at all on him or the diving board.
Bright Eyes - S1-E7
Other mistake: SPOILER: Gambit's funeral is taking place in his hometown of New Orleans, as evidenced by the coffins being above ground (because New Orleans is at or below sea level). However, Gambit's coffin is oddly lowered into the ground.
Continuity mistake: When Wolverine opens the door and Emma Frost is there, she is within less than an arm's reach of the door. When she says she has decided to join the X-Men, she along with Wolverine and Angel are suddenly a few steps outside away from the door, even though she was never shown stepping back. (00:02:17)
Continuity mistake: At the start of the episode when Vinnie and Rocket search for Gabby's pet badger, after updating her, Vinnie goes back into his bedroom where Rocket is seen in the room pulling out a pirate's peg leg, Professor Q's "oscilloradioscope", and a baking soda volcano from behind his back. However, for about a frame, the other 2 items were also peg legs before turning into the respective item. His mouth also tilts between frames. (00:00:25)
Factual error: The forces of Cassiopeia all sport the crown-like "W" sign which is the shape of that constellation... but only as seen from earth! These five points in three-dimensional space (like all star signs named after anything) look like that when viewed from our own planet; but from anywhere else, they aren't shaped like that at all. Why would they chose to see themselves through a very specific angle of view from some other distant planet (earth)?
Misty's Magical Mix-Up!/Bone's Lucky Doubloon - S2-E31
Other mistake: In the episode "Bone's Lucky Doubloon," Captain Hook, Smee and another pirate are washed downstream, go over a waterfall and land in a lake. When they emerge from the lake, no water is dripping from them.
Continuity mistake: When Mario and Luigi jump out of their gondola, Luigi's left glove goes from absent to present.
Young Kidaichi's Murder: File 4 - S2-E4
Continuity mistake: In the denouement, Kindaichi hands the two pictures to the cameraman and Jinmochi. When he asks if he then changed on a whim, he's still holding the photo himself. (00:12:20)
Continuity mistake: Multiple times throughout the show, Kimber can be seen in quick shots with light pink hair (the same color as Jem's), when her hair color is actually a dark pink/red color. (02:00:00)
Factual error: When the large Dutch guy tells his story about his life in Holland, there are a several windmills. However, the blades are placed on the wrong side, that way it's not possible for a windmill to turn clockwise, which it does. If the blades were placed correctly, they would still turn to the wrong side, because wooden windmills in The Netherlands are always turning counter-clockwise.
Continuity mistake: When King mentions the two brothers' "destiny", his big feline is at Young Diabolik's side, facing King and the others. Aerial shot, and the panther is at King's side facing Diabolik. (00:05:00)